Event: League Division Three

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Opponent	Rating	Result
Ben Strutt	0	0 - 1
Marcin Skopinski	127	½ - ½
Samuel J Playford	123	0 - 1

performance = (sum(opponents ratings) + 400(wins-losses)) / games

-183 = (250 + 400 * (0 - 2)) / 3)